One tip for those occasional times the garage door didn't open the entire way...
Try to catch the ball with one of your flippers, either one. Hold the ball there for 3-5 seconds and the garage door will shut itself. Then with the other flipper tap it once and the garage door will re-open.
This even works during multiball if you can catch both balls. It's handy when one ball stops the other from opening the garage fully so this can occur even if you have a fully working coil.
Cheers.